/**
 */
package Alloy;

import org.eclipse.emf.ecore.EObject;

/**
 * <!-- begin-user-doc -->
 * A representation of the model object '<em><b>Quality Relation</b></em>'.
 * <!-- end-user-doc -->
 *
 * <!-- begin-model-doc -->
 * prototype implementation of qualities
 * only as top-level relations between qualities in the before- and after- situation
 * <!-- end-model-doc -->
 *
 * <p>
 * The following features are supported:
 * <ul>
 *   <li>{@link Alloy.QualityRelation#getSource <em>Source</em>}</li>
 *   <li>{@link Alloy.QualityRelation#getTarget <em>Target</em>}</li>
 *   <li>{@link Alloy.QualityRelation#getComparator <em>Comparator</em>}</li>
 * </ul>
 * </p>
 *
 * @see Alloy.AlloyPackage#getQualityRelation()
 * @model
 * @generated
 */
public interface QualityRelation extends EObject {
	/**
	 * Returns the value of the '<em><b>Source</b></em>' reference.
	 * <!-- begin-user-doc -->
	 * <p>
	 * If the meaning of the '<em>Source</em>' reference isn't clear,
	 * there really should be more of a description here...
	 * </p>
	 * <!-- end-user-doc -->
	 * @return the value of the '<em>Source</em>' reference.
	 * @see #setSource(QualityVariable)
	 * @see Alloy.AlloyPackage#getQualityRelation_Source()
	 * @model required="true"
	 * @generated
	 */
	QualityVariable getSource();

	/**
	 * Sets the value of the '{@link Alloy.QualityRelation#getSource <em>Source</em>}' reference.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @param value the new value of the '<em>Source</em>' reference.
	 * @see #getSource()
	 * @generated
	 */
	void setSource(QualityVariable value);

	/**
	 * Returns the value of the '<em><b>Target</b></em>' reference.
	 * <!-- begin-user-doc -->
	 * <p>
	 * If the meaning of the '<em>Target</em>' reference isn't clear,
	 * there really should be more of a description here...
	 * </p>
	 * <!-- end-user-doc -->
	 * @return the value of the '<em>Target</em>' reference.
	 * @see #setTarget(QualityVariable)
	 * @see Alloy.AlloyPackage#getQualityRelation_Target()
	 * @model required="true"
	 * @generated
	 */
	QualityVariable getTarget();

	/**
	 * Sets the value of the '{@link Alloy.QualityRelation#getTarget <em>Target</em>}' reference.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @param value the new value of the '<em>Target</em>' reference.
	 * @see #getTarget()
	 * @generated
	 */
	void setTarget(QualityVariable value);

	/**
	 * Returns the value of the '<em><b>Comparator</b></em>' attribute.
	 * The literals are from the enumeration {@link Alloy.Comparator}.
	 * <!-- begin-user-doc -->
	 * <p>
	 * If the meaning of the '<em>Comparator</em>' attribute isn't clear,
	 * there really should be more of a description here...
	 * </p>
	 * <!-- end-user-doc -->
	 * @return the value of the '<em>Comparator</em>' attribute.
	 * @see Alloy.Comparator
	 * @see #setComparator(Comparator)
	 * @see Alloy.AlloyPackage#getQualityRelation_Comparator()
	 * @model required="true"
	 * @generated
	 */
	Comparator getComparator();

	/**
	 * Sets the value of the '{@link Alloy.QualityRelation#getComparator <em>Comparator</em>}' attribute.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @param value the new value of the '<em>Comparator</em>' attribute.
	 * @see Alloy.Comparator
	 * @see #getComparator()
	 * @generated
	 */
	void setComparator(Comparator value);

} // QualityRelation
